I have seen this same issue. The CRON job will start at 02:00 and then out of the blue the same job will be executed at 02:00:58. This is very strange and does not occur too often. The job itself is executed once per week and it should not repeat itself.

The change I suggested does eliminate many of the issues but it is still occurring on my machine.

On my system it appears that the timer is popping a few seconds early which is causing the same job(s) to be re-executed thus generating many complaints. For example, it should pop at 02:00 and the 2nd one occurs at 02:59 thus re-executing all of the 02:00 scheduled jobs. Is there any debugging or tracing that I can enable to figure out why the timer is popping more than once?